xref: /onnv-gate/usr/src/lib/libzfs/common/libzfs.h (revision 1356)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef	_LIBZFS_H
#define	_LIBZFS_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <assert.h>
#include <libnvpair.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/varargs.h>
#include <sys/fs/zfs.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * Miscellaneous ZFS constants
 */
#define	ZFS_MAXNAMELEN		MAXNAMELEN
#define	ZPOOL_MAXNAMELEN	MAXNAMELEN
#define	ZFS_MAXPROPLEN		MAXPATHLEN

/*
 * Basic handle types
 */
typedef struct zfs_handle zfs_handle_t;
typedef struct zpool_handle zpool_handle_t;

/*
 * Basic handle functions
 */
extern zpool_handle_t *zpool_open(const char *);
extern zpool_handle_t *zpool_open_canfail(const char *);
extern void zpool_close(zpool_handle_t *);
extern const char *zpool_get_name(zpool_handle_t *);
extern uint64_t zpool_get_guid(zpool_handle_t *);
extern uint64_t zpool_get_space_used(zpool_handle_t *);
extern uint64_t zpool_get_space_total(zpool_handle_t *);
extern int zpool_get_root(zpool_handle_t *, char *, size_t);
extern int zpool_get_state(zpool_handle_t *);

/*
 * Iterate over all active pools in the system.
 */
typedef int (*zpool_iter_f)(zpool_handle_t *, void *);
extern int zpool_iter(zpool_iter_f, void *);

/*
 * Functions to create and destroy pools
 */
extern int zpool_create(const char *, nvlist_t *, const char *);
extern int zpool_destroy(zpool_handle_t *);
extern int zpool_add(zpool_handle_t *, nvlist_t *);

/*
 * Functions to manipulate pool and vdev state
 */
extern int zpool_scrub(zpool_handle_t *, pool_scrub_type_t);

extern int zpool_vdev_online(zpool_handle_t *, const char *);
extern int zpool_vdev_offline(zpool_handle_t *, const char *);
extern int zpool_vdev_attach(zpool_handle_t *, const char *, const char *,
    nvlist_t *, int);
extern int zpool_vdev_detach(zpool_handle_t *, const char *);

/*
 * Pool health statistics.
 */
typedef enum {
	/*
	 * The following correspond to faults as defined in the (fault.fs.zfs.*)
	 * event namespace.  Each is associated with a corresponding message ID.
	 */
	ZPOOL_STATUS_CORRUPT_CACHE,	/* corrupt /kernel/drv/zpool.cache */
	ZPOOL_STATUS_MISSING_DEV_R,	/* missing device with replicas */
	ZPOOL_STATUS_MISSING_DEV_NR,	/* missing device with no replicas */
	ZPOOL_STATUS_CORRUPT_LABEL_R,	/* bad device label with replicas */
	ZPOOL_STATUS_CORRUPT_LABEL_NR,	/* bad device label with no replicas */
	ZPOOL_STATUS_BAD_GUID_SUM,	/* sum of device guids didn't match */
	ZPOOL_STATUS_CORRUPT_POOL,	/* pool metadata is corrupted */
	ZPOOL_STATUS_CORRUPT_DATA,	/* data errors in user (meta)data */
	ZPOOL_STATUS_FAILING_DEV,	/* device experiencing errors */
	ZPOOL_STATUS_VERSION_MISMATCH,	/* bad on-disk version */

	/*
	 * The following are not faults per se, but still an error possibly
	 * requiring administrative attention.  There is no corresponding
	 * message ID.
	 */
	ZPOOL_STATUS_RESILVERING,	/* device being resilvered */
	ZPOOL_STATUS_OFFLINE_DEV,	/* device online */

	/*
	 * Finally, the following indicates a healthy pool.
	 */
	ZPOOL_STATUS_OK
} zpool_status_t;

extern zpool_status_t zpool_get_status(zpool_handle_t *, char **msgid);
extern zpool_status_t zpool_import_status(nvlist_t *, char **msgid);

/*
 * Statistics and configuration functions.
 */
extern nvlist_t *zpool_get_config(zpool_handle_t *, nvlist_t **oldconfig);
extern int zpool_refresh_stats(zpool_handle_t *);

/*
 * Import and export functions
 */
extern int zpool_export(zpool_handle_t *);
extern int zpool_import(nvlist_t *, const char *, const char *);

/*
 * Search for pools to import
 */
extern nvlist_t *zpool_find_import(int argc, char **argv);

/*
 * Miscellaneous pool functions
 */
extern char *zpool_vdev_name(zpool_handle_t *, nvlist_t *);

/*
 * Basic handle manipulations.  These functions do not create or destroy the
 * underlying datasets, only the references to them.
 */
extern zfs_handle_t *zfs_open(const char *, int);
extern void zfs_close(zfs_handle_t *);
extern zfs_type_t zfs_get_type(const zfs_handle_t *);
extern const char *zfs_get_name(const zfs_handle_t *);

typedef enum {
	ZFS_SRC_NONE = 0x1,
	ZFS_SRC_DEFAULT = 0x2,
	ZFS_SRC_TEMPORARY = 0x4,
	ZFS_SRC_LOCAL = 0x8,
	ZFS_SRC_INHERITED = 0x10
} zfs_source_t;

#define	ZFS_SRC_ALL	0x1f

/*
 * Property management functions.  Some functions are shared with the kernel,
 * and are found in sys/fs/zfs.h.
 */
const char *zfs_prop_to_name(zfs_prop_t);
int zfs_prop_set(zfs_handle_t *, zfs_prop_t, const char *);
int zfs_prop_get(zfs_handle_t *, zfs_prop_t, char *, size_t, zfs_source_t *,
    char *, size_t, int);
int zfs_prop_get_numeric(zfs_handle_t *, zfs_prop_t, uint64_t *, zfs_source_t *,
    char *, size_t);
uint64_t zfs_prop_get_int(zfs_handle_t *, zfs_prop_t);
int zfs_prop_validate(zfs_prop_t, const char *, uint64_t *);
int zfs_prop_inheritable(zfs_prop_t);
int zfs_prop_inherit(zfs_handle_t *, zfs_prop_t);
const char *zfs_prop_values(zfs_prop_t);
int zfs_prop_valid_for_type(zfs_prop_t, int);
const char *zfs_prop_default_string(zfs_prop_t prop);
uint64_t zfs_prop_default_numeric(zfs_prop_t);
int zfs_prop_is_string(zfs_prop_t prop);
const char *zfs_prop_column_name(zfs_prop_t);
const char *zfs_prop_column_format(zfs_prop_t);
int zfs_get_proplist(char *fields, zfs_prop_t *proplist, int max, int *count,
    char **badopt);

#define	ZFS_MOUNTPOINT_NONE	"none"
#define	ZFS_MOUNTPOINT_LEGACY	"legacy"

/*
 * Iterator functions.
 */
typedef int (*zfs_iter_f)(zfs_handle_t *, void *);
extern int zfs_iter_root(zfs_iter_f, void *);
extern int zfs_iter_children(zfs_handle_t *, zfs_iter_f, void *);
extern int zfs_iter_dependents(zfs_handle_t *, zfs_iter_f, void *);
extern int zfs_iter_filesystems(zfs_handle_t *, zfs_iter_f, void *);
extern int zfs_iter_snapshots(zfs_handle_t *, zfs_iter_f, void *);

/*
 * Functions to create and destroy datasets.
 */
extern int zfs_create(const char *, zfs_type_t, const char *, const char *);
extern int zfs_destroy(zfs_handle_t *);
extern int zfs_clone(zfs_handle_t *, const char *);
extern int zfs_snapshot(const char *);
extern int zfs_rollback(zfs_handle_t *, zfs_handle_t *, int);
extern int zfs_rename(zfs_handle_t *, const char *);
extern int zfs_backup(zfs_handle_t *, zfs_handle_t *);
extern int zfs_restore(const char *, int, int, int);

/*
 * Miscellaneous functions.
 */
extern const char *zfs_type_to_name(zfs_type_t);
extern void zfs_refresh_properties(zfs_handle_t *);
extern int zfs_name_valid(const char *, zfs_type_t);

/*
 * Mount support functions.
 */
extern int zfs_is_mounted(zfs_handle_t *, char **);
extern int zfs_mount(zfs_handle_t *, const char *, int);
extern int zfs_unmount(zfs_handle_t *, const char *, int);
extern int zfs_unmountall(zfs_handle_t *, int);

/*
 * Share support functions.
 */
extern int zfs_is_shared(zfs_handle_t *, char **);
extern int zfs_share(zfs_handle_t *);
extern int zfs_unshare(zfs_handle_t *, const char *);
extern int zfs_unshareall(zfs_handle_t *);

/*
 * For clients that need to capture error output.
 */
extern void zfs_set_error_handler(void (*)(const char *, va_list));

/*
 * When dealing with nvlists, verify() is extremely useful
 */
#ifdef NDEBUG
#define	verify(EX)	((void)(EX))
#else
#define	verify(EX)	assert(EX)
#endif

/*
 * Utility function to convert a number to a human-readable form.
 */
extern void zfs_nicenum(uint64_t, char *, size_t);
extern int zfs_nicestrtonum(const char *, uint64_t *);

/*
 * Pool destroy special.  Remove the device information without destroying
 * the underlying dataset.
 */
extern int zfs_remove_link(zfs_handle_t *);

/*
 * Given a device or file, determine if it is part of a pool.
 */
extern int zpool_in_use(int fd, pool_state_t *state, char **name);

/*
 * ftyp special.  Read the label from a given device.
 */
extern nvlist_t *zpool_read_label(int fd);

/*
 * Create and remove zvol /dev links
 */
extern int zpool_create_zvol_links(zpool_handle_t *);
extern int zpool_remove_zvol_links(zpool_handle_t *);

/*
 * zoneadmd hack
 */
extern void zfs_init(void);

/*
 * Useful defines
 */
#ifndef TRUE
#define	TRUE	1
#endif
#ifndef FALSE
#define	FALSE	0
#endif

#ifdef	__cplusplus
}
#endif

#endif	/* _LIBZFS_H */